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***************************************************************************/
#include "stdafx.h"
#include "API/Device.h"
#include "API/QueryHeap.h"

namespace Falcor
{
    static VkQueryType getVkPoolType(QueryHeap::Type t)
    {
        switch (t)
        {
        case QueryHeap::Type::Timestamp:
            return VK_QUERY_TYPE_TIMESTAMP;
        case QueryHeap::Type::Occlusion:
            return VK_QUERY_TYPE_OCCLUSION;
        case QueryHeap::Type::PipelineStats:
            return VK_QUERY_TYPE_PIPELINE_STATISTICS;
        default:
            should_not_get_here();
            return VK_QUERY_TYPE_MAX_ENUM;
        }
    }

    QueryHeap::QueryHeap(Type type, uint32_t count) : mType(type), mCount(count)
    {
        VkQueryPoolCreateInfo info = {};
        info.sType = VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO;
        info.queryCount = count;
        info.queryType = getVkPoolType(type);
        info.pipelineStatistics = VK_QUERY_PIPELINE_STATISTIC_FLAG_BITS_MAX_ENUM;
        VkQueryPool pool;
        vk_call(vkCreateQueryPool(gpDevice->getApiHandle(), &info, nullptr, &pool));
        mApiHandle = ApiHandle::create(pool);
    }
}